Use this page to view archived advisories. The table below shows the overall danger rating and the bottom line for the 20 most recent advisories. Click on the time and date link above each danger rating icon to view the full advisory for that day. Use the date chooser or the pager at the bottom to scroll through the older advisories.
Date the advisory was published: | Forecast Region | |
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Click here to see the full advisory for 2020-02-22 |
February 22, 2020 at 6:44 Hard slabs of drifted snow may pose a hazard in the tops and sides of chutes and on large, open faces. Avoid this terrain if you find firm, polished and hollow sounding surface snow. Sluffs of heavy wet snow are possible on steep slopes where sustained sun is melting the surface snow. Both of these hazards are isolated. Don't dawdle under steep faces topped by overhanging cornices, especially those where you see snow swirling near ridges. |
Whitefish Range |
Click here to see the full advisory for 2020-02-22 |
February 22, 2020 at 6:44 Hard slabs of drifted snow may pose a hazard in the tops and sides of chutes and on large, open faces. Avoid this terrain if you find firm, polished and hollow sounding surface snow. Sluffs of heavy wet snow are possible on steep slopes where sustained sun is melting the surface snow. Both of these hazards are isolated. Don't dawdle under steep faces topped by overhanging cornices, especially those where you see snow swirling near ridges. |
Swan Range |
Click here to see the full advisory for 2020-02-22 |
February 22, 2020 at 5:34 Hard slabs of drifted snow may pose a hazard in the tops and sides of chutes and on large, open faces. Avoid this terrain if you find firm, polished and hollow sounding surface snow. Sluffs of heavy wet snow are possible on steep slopes where sustained sun is melting the surface snow. Both of these hazards are isolated. Don't dawdle under steep faces topped by overhanging cornices, especially those where you see snow swirling around near ridges. |
Flathead Range and Glacier National Park |
Click here to see the full advisory for 2020-02-21 |
February 21, 2020 at 7:08 Today the avalanche danger may rise to Moderate as the sun warms southerly aspects. Slopes that are not cooled by increasing southwesterly winds will be of most concern. Seek out cold powder on shady slopes while keeping alert for pockets of recently-drifted snow. |
Flathead Range and Glacier National Park |
Click here to see the full advisory for 2020-02-21 |
February 21, 2020 at 6:49 Today the avalanche danger may rise to Moderate as the sun warms southerly aspects. Slopes that are not cooled by increasing southwesterly winds will be of most concern. Seek out cold powder on shady slopes while staying alert for pockets of recently-drifted snow. |
Whitefish Range |
Click here to see the full advisory for 2020-02-21 |
February 21, 2020 at 6:49 Today the avalanche danger may rise to Moderate as the sun warms southerly aspects. Slopes that are not cooled by increasing southwesterly winds will be of most concern. Seek out cold powder on shady slopes while staying alert for pockets of recently-drifted snow. |
Swan Range |
Click here to see the full advisory for 2020-02-20 |
February 20, 2020 at 6:57 Warming temperatures and clear skies will increase the avalanche danger to Moderate throughout the day. Yesterday riders reported numerous loose dry and loose wet avalanches on south-facing slopes. Warmer and sunnier weather today will exacerbate this problem making wet loose avalanches and cornice falls more of a threat. Stick to cold powder on north-facing slopes while staying out from underneath overhead cornice hazards. |
Flathead Range and Glacier National Park |
Click here to see the full advisory for 2020-02-20 |
February 20, 2020 at 6:38 Warming temperatures and clear skies will increase the avalanche danger to Moderate throughout the day. Yesterday riders reported numerous loose dry and loose wet avalanches on south-facing slopes. Warmer and sunnier weather today will exacerbate this problem making wet loose avalanches and cornice falls more of a threat. Stick to cold powder on north-facing slopes while staying out from underneath overhead cornice hazards. |
Whitefish Range |
Click here to see the full advisory for 2020-02-20 |
February 20, 2020 at 6:38 Warming temperatures and clear skies will increase the avalanche danger to Moderate throughout the day. Yesterday riders reported numerous loose dry and loose wet avalanches on south-facing slopes. Warmer and sunnier weather today will exacerbate this problem making wet loose avalanches and cornice falls more of a threat. Stick to cold powder on north-facing slopes while staying out from underneath overhead cornice hazards. |
Swan Range |
Click here to see the full advisory for 2020-02-19 |
February 19, 2020 at 7:01 Today will be a beautiful day to enjoy stable powder on cold, shaded aspects. The avalanche danger could rise to MODERATE as sunshine and warming temperatures increase the threat of loose wet avalanches on sun-baked slopes. Continue to minimize your exposure below large, overhanging cornices. |
Flathead Range and Glacier National Park |
Click here to see the full advisory for 2020-02-19 |
February 19, 2020 at 6:42 Today will be a beautiful day to enjoy stable powder on cold, shaded aspects. The avalanche danger could rise to MODERATE as sunshine and warming temperatures increase the threat of loose wet avalanches on sun-baked slopes. Continue to minimize your exposure below large, overhanging cornices. |
Whitefish Range |
Click here to see the full advisory for 2020-02-19 |
February 19, 2020 at 6:42 Today will be a beautiful day to enjoy stable powder on cold, shaded aspects. The avalanche danger could rise to MODERATE as sunshine and warming temperatures increase the threat of loose wet avalanches on sun-baked slopes. Continue to minimize your exposure below large, overhanging cornices. |
Swan Range |
Click here to see the full advisory for 2020-02-18 |
February 18, 2020 at 7:02 Storm snow from the weekend is stabilizing. If there are any lingering slab instabilities, they are most likely to be found on the highest, most heavily windloaded slopes. Otherwise, be mindful of shallow sluffing in the top few inches of snow, especially as the sun comes out this afternoon. Continue to give sagging cornices and alpine faces below them caution. |
Flathead Range and Glacier National Park |
Click here to see the full advisory for 2020-02-18 |
February 18, 2020 at 7:01 Storm snow from the weekend is stabilizing. If there are any lingering slab instabilities, they are most likely to be found on the highest, most heavily windloaded slopes. Otherwise, be mindful of shallow sluffing in the top few inches of snow, especially as the sun comes out this afternoon. Continue to give sagging cornices plenty of space. |
Swan Range |
Click here to see the full advisory for 2020-02-18 |
February 18, 2020 at 6:45 Storm snow from the weekend is stabilizing. If there are any lingering slab instabilities, they are most likely to be found on the highest, most heavily windloaded slopes. Otherwise, be mindful of shallow sluffing in the top few inches of snow, especially as the sun comes out this afternoon. Continue to give sagging cornices plenty of space. |
Whitefish Range |
Click here to see the full advisory for 2020-02-17 |
February 17, 2020 at 6:10 Though the avalanche danger is trending downward, you can still get into trouble today. The most obvious hazard is recently drifted slabs on leeward slopes. These may be stubborn, but don’t expect them to be safe. Start small and use test slopes before venturing onto steep, open terrain. Shooting cracks are signs you should step back from wind loaded terrain. Cohesionless snow will sluff on very steep slopes. If you want to avoid any problems, seek low angled, sheltered terrain. |
Whitefish Range |
Click here to see the full advisory for 2020-02-17 |
February 17, 2020 at 6:08 Though the avalanche danger is trending downward, you can still get into trouble today. A few more inches of snow can mask the obvious hazard of recently drifted slabs. Start small and use safe test slopes before venturing onto steep, open terrain. Shooting cracks are signs you should step back and make simpler terrain choices. New snow will sluff on very steep slopes. If you want to avoid any problems, seek low angled, sheltered terrain. |
Swan Range |
Click here to see the full advisory for 2020-02-17 |
February 17, 2020 at 6:06 Though the avalanche danger is trending downward, you can still get into trouble today. A few more inches of snow can mask the obvious hazard of recently drifted slabs. Start small and use safe test slopes before venturing onto steep, open terrain. Shooting cracks are signs you should step back and make simpler terrain choices. New snow will sluff on very steep slopes. If you want to avoid any problems, seek low angled, sheltered terrain. |
Flathead Range and Glacier National Park |
Click here to see the full advisory for 2020-02-16 |
February 16, 2020 at 6:33 You can manage the risk of fresh wind slabs by avoiding steep leeward slopes. If you want to step out, start small and use safe test slopes before venturing onto steep, open terrain. Watch for rounded drifts below ridgelines and the sidewalls of gullies. Signs of danger include shooting cracks in drifted snow and long running sluffs. In sheltered terrain, sluffs may entrain large amounts of snow and pile up pile up in terrain traps. |
Whitefish Range |
Click here to see the full advisory for 2020-02-16 |
February 16, 2020 at 6:26 More snow and wind will increase the danger of near-surface avalanche problems. Your risk of triggering slides will be greater in steeper, more consequential terrain. Start small and use safe test slopes before venturing onto steep, open terrain. Shooting cracks and long running sluffs are clues to dial back your slope angles. Watch for drifts of snow under cornices and in exposed areas. |
Swan Range |
Click here to see the full advisory for 2020-02-16 |
February 16, 2020 at 6:24 More snow and wind will increase the danger of near-surface avalanche problems. Your risk of triggering slides will be greater in steeper, more consequential terrain. Start small and use safe test slopes before venturing onto steep, open terrain. Shooting cracks and long running sluffs are clues to dial back your slope angles. Watch for drifts of snow under cornices and in exposed areas. |
Flathead Range and Glacier National Park |
Click here to see the full advisory for 2020-02-15 |
February 15, 2020 at 6:57 Sticking to slopes sheltered from the wind will get you good riding and reduce your risk of triggering slabs of drifted snow that break 1 to 2 feet deep. Near ridges and peaks, these will be larger and more likely to bury or injure a rider. On very steep slopes with loose dry snow near the surface, triggering sluffs above a gully, trees, or a cliff may get you into trouble. |
Whitefish Range |
Click here to see the full advisory for 2020-02-15 |
February 15, 2020 at 6:53 Sticking to slopes sheltered from the wind will get you good riding and reduce your risk of triggering slabs of drifted snow that break 1 to 2 feet deep. Near the crest of the range, triggered slabs will be larger and more likely to to bury or injure a rider. On very steep slopes with loose dry snow near the surface, triggering sluffs above a gully, trees, or a cliff may get you into trouble. |
Swan Range |
Click here to see the full advisory for 2020-02-15 |
February 15, 2020 at 5:48 Sticking to slopes sheltered from the winds will get you good riding and reduce your risk of triggering slabs of drifted snow that break 1 to 2 feet deep. On very steep slopes with loose dry snow near the surface, triggering sluffs above a gully, trees, or a cliff may get you into trouble. Avoid the runouts of large avalanche paths that start below overhanging cornices. |
Flathead Range and Glacier National Park |
Click here to see the full advisory for 2020-02-14 |
February 14, 2020 at 7:06 Today's avalanche danger depends on snowfall, with the greatest danger on steep slopes where more than about 8 inches of new and/ or drifted snow has accumulated since Thursday. These conditions will be most widespread near upper elevation ridges and peaks, where winds can gather new snow into thick, dense slabs. Keep it simple by sticking to slopes less than 35 degrees if you find these conditions. Avoid the runouts of large avalanche paths that start below overhanging cornices. |
Flathead Range and Glacier National Park |
Click here to see the full advisory for 2020-02-14 |
February 14, 2020 at 6:45 Today's avalanche danger depends on snowfall, with the greatest danger on steep slopes where more than about 8 inches of new and/ or drifted snow has accumulated since Thursday. These conditions will be most widespread near upper elevation ridges and peaks, where winds can gather new snow into thick, dense slabs. You can keep it simple by sticking to slopes less than 35 degrees if you find these conditions. |
Whitefish Range |
Click here to see the full advisory for 2020-02-14 |
February 14, 2020 at 6:45 Today's avalanche danger depends on snowfall, with the greatest danger on steep slopes where more than about 8 inches of new and/ or drifted snow has accumulated since Thursday. These conditions will be most widespread near upper elevation ridges and peaks, where winds can gather new snow into thick, dense slabs. You can keep it simple by sticking to slopes less than 35 degrees if you find these conditions. |
Swan Range |
Click here to see the full advisory for 2020-02-13 |
February 13, 2020 at 6:54 Skiers and riders continue to find stiff slabs of drifted snow from Tuesday's wind loading event. Slabs a foot thick remain a lingering concern for the Swan and Flathead Range, as well as Glacier National Park. Steer around pillowy surfaces that formed below ridgelines and on cross-loaded terrain features. Afternoon sun and warm temperatures may produce wet loose avalanches. Look for point releases out of rocky areas or rollerballs as signs to seek out shaded aspects. |
Flathead Range and Glacier National Park |
Click here to see the full advisory for 2020-02-13 |
February 13, 2020 at 6:53 Skiers and riders continue to find stiff slabs of drifted snow from Tuesday's wind loading event. Slabs a foot thick remain a lingering concern for the Swan and Flathead Range, as well as Glacier National Park. Steer around pillowy surfaces that formed below ridgelines and on cross-loaded terrain features. Afternoon sun and warm temperatures may produce wet loose avalanches. Look for point releases out of rocky areas or rollerballs as signs to seek out shaded aspects. |
Swan Range |
Click here to see the full advisory for 2020-02-13 |
February 13, 2020 at 6:46 Generally stable avalanche conditions will continue today. Afternoon sun and warm temperatures may produce small wet loose avalanches. Look for point releases out of rocky areas or rollerballs as signs to seek out shaded aspects. Shallow pockets of wind drifted snow linger. These will be easy to identify by seeing pillowy looking surfaces below recent cornice formations or on cross-loaded terrain features. |
Whitefish Range |